Cover for electrical boxes



FIG. 1 is a front elevational view of a cover for electrical boxes embodying our design;

FIG. 2 is a right side elevation of the cover of FIG. 1;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side elevation thereof; and,

FIG. 6 is a back view thereof.

The broken line showing throughout the drawing Figures is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

The ornamental design for a cover for electrical boxes, as shown. 